I intend to connect 2 air compressors via a manifold to service my shop air. One single stage 5hp (single phase) compressor with a 60 gal. tank will be the primary source. The second compressor is 5hp (3 phase) with an 80 gal. tank and will only be used if more CFM is needed. The loop in the shop is 3/4" copper. I understand it's good practice to make the riser going to such a loop larger than normal to trap moisture by slowing down air velocity. I was planning to make the riser 1" but was wondering if it should be larger. Any formulas or guidance on sizing the riser?